<!DOCTYPE html>
<html lang="en">
    <head>
        <meta charset="UTF-8">
        <meta http-equiv="X-UA-Compatible" content="IE=edge">
        <meta name="viewport" content="width=device-width, initial-scale=1.0">
        <title>Document</title>
        <link rel="stylesheet" href="card.css">
        <link rel='stylesheet' href='../static/fonts/font-awesome.css'>
        <link rel='stylesheet' href='../static/bootstrap-3.4.1/css/bootstrap.css'>
    </head>
    <body>
        <span class="box">
            <div class="btn btn-lg btn-default ">
                <div class="fa fa-flag inner-icon"></div>
                <div class="inner-title">
                    待办任务
                </div>
            </div>
        </span>
        <span class="box">
            <div class="btn btn-lg btn-default ">
                <div class="fa fa-flag inner-icon"></div>
                <div class="inner-title">
                    待办任务
                </div>
            </div>
        </span>
        <span class="box">
            <div class="btn btn-lg btn-default ">
                <div class="fa fa-flag inner-icon"></div>
                <div class="inner-title">
                    待办任务
                </div>
            </div>
        </span>
        <span class="box">
            <div class="btn btn-lg btn-default ">
                <div class="fa fa-flag inner-icon"></div>
                <div class="inner-title">
                    待办任务
                </div>
            </div>
        </span>
        <span class="box">
            <div class="btn btn-lg btn-default ">
                <div class="fa fa-flag inner-icon"></div>
                <div class="inner-title">
                    待办任务
                </div>
            </div>
        </span>
        <span class="box">
            <div class="btn btn-lg btn-default">
                <div class="fa fa-flag inner-icon"></div>
                <div class="inner-title">
                    待办任务
                </div>
            </div>
        </span>
    </body>

    <style type="text/css">

        .box {
            margin: 5px;
            float: left;
        }

        .inner-icon {
            font-size: 200px;
            color: #337ab7;
        }

        .inner-title {
            width: 300px;
            text-align: center;
            font-weight: bold;
            margin-bottom: 2px;
        }
    </style>
</html>